HITRAN on the Web

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All users (unregistered and registered) may:

  • Survey the HITRAN database content for a specified spectral range
  • Specify a mixture of vibrational bands for a given HITRAN isotopologue for a selected wavenumber region
  • Specify a gas mixture from a set of built-in standard atmospheric concentration profiles for a selected wavenumber region
  • Visualize a stick intensity diagram of the specified mixture
  • Simulate one of built-in spectral functions (absorption coefficient profile, transmittance, absorption, or radiance) of the mixture spectrum convolved with one of built-in apparatus functions for various physical (temperature, pressure, pathlength) and simulation (intensity cutoff, contour shape, wing length, resolution, etc) conditions
  • Download simulation results in numerical and/or graphical format on user's computer.

Registered users may also:

  • Prepare user defined gas mixtures
  • Save simulation results on the server side
  • Upload user's spectra to the server side and compare them to simulated spectra from HITRAN data

The registration in the system is free. Just click the button "New user" in user logging form and fill in the form that appears.

Usage agreement

Users of the Hitran on the Web Information System agree to reference it in scientific publications, presentations and communications if the system is useful for their investigations.


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Other sites of the portal on molecular spectroscopy


2 November 2023

The 17th HITRAN Conference will take place 24-26 June 2024 at the Harvard-Smithsonian Center for Astrophysics in Cambridge, Massachusetts. The meeting is united with the 16th ASA workshop.

17 April 2023

Updates 2022/2023 of the H2O, CO2, H2, and CH3CN line lists are available now.

12 January 2022

The spectral line  parameters correspond to the HITRAN2020 version.

16 September 2021

From March 1, 2022, this site will be available ONLY on the tsu.ru domain, but not on iao.ru.
It is possible that these changes will occur later, but we cannot provide such a guarantee.

19 November 2019

Partition functions Q(T) of the 17O13C17O molecule are added to the database in the temperature range 1-1000 K (calculation by S. A. Tashkun, 2019)

More news